1320313031 has 2 divisors, whose sum is σ = 1320313032. Its totient is φ = 1320313030.

The previous prime is 1320313013. The next prime is 1320313067. The reversal of 1320313031 is 1303130231.

Together with previous prime (1320313013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320313031 - 2²⁶ = 1253204167 is a prime.

It is a super-2 number, since 2×1320313031² = 3486452999656813922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320313081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660156515 + 660156516.

It is an arithmetic number, because the mean of its divisors is an integer number (660156516).

Almost surely, 2^1320313031 is an apocalyptic number.

1320313031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320313031 is an equidigital number, since it uses as much as digits as its factorization.

1320313031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1320313031 is about 36336.1119411530. Note that the first 3 decimals coincide. The cubic root of 1320313031 is about 1097.0480164854.

Adding to 1320313031 its reverse (1303130231), we get a palindrome (2623443262).

The spelling of 1320313031 in words is "one billion, three hundred twenty million, three hundred thirteen thousand, thirty-one".